/*
 * Copyright (C) 2008 ProSyst Software GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.modulefusion.featurepack.wicket;

import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Iterator;

import org.apache.wicket.application.IClassResolver;
import org.osgi.framework.BundleContext;

public class BundleClassLoader implements IClassResolver {

	private final BundleContext context;

	public BundleClassLoader(BundleContext context) {
		this.context = context;
	}

	public Class<?> resolveClass(String classname) throws ClassNotFoundException {
		try {
			return context.getBundle().loadClass(classname);
		} catch (ClassNotFoundException e) {
			// ignore, expected in many cases
		} catch (IllegalStateException e) {
		}
		return null;
	}

	@SuppressWarnings("unchecked")
	public Iterator<URL> getResources(String name) {
		try {
			Enumeration<URL> resources = context.getBundle().getResources(name);
			if (resources == null)
				return new ArrayList<URL>().iterator();
			
			ArrayList<URL> asList = Collections.list(resources);
			return asList.iterator();

		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}
}